https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&feedformat=atom&user=24.85.241.128explain xkcd - User contributions [en]2026-06-25T16:13:32ZUser contributionsMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=Talk:435:_Purity&diff=20662Talk:435: Purity2012-12-03T07:20:52Z<p>24.85.241.128: Created page with "See Comte's hierarchy of the sciences from [http://en.wikipedia.org/wiki/Law_of_three_stages his law of three stages]: Mathematics; Astronomy; Physics; Chemistry; Biology; Psy..."</p>
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<div>See Comte's hierarchy of the sciences from [http://en.wikipedia.org/wiki/Law_of_three_stages his law of three stages]: Mathematics; Astronomy; Physics; Chemistry; Biology; Psychology; Sociology. --[[Special:Contributions/24.85.241.128|24.85.241.128]] 07:20, 3 December 2012 (UTC)</div>24.85.241.128